1 /*
   2  * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.security.spec;
  26 
  27 import java.math.BigInteger;
  28 
  29 /**
  30  * This immutable class specifies an elliptic curve private key with
  31  * its associated parameters.
  32  *
  33  * @see KeySpec
  34  * @see ECParameterSpec
  35  *
  36  * @author Valerie Peng
  37  *
  38  * @since 1.5
  39  */
  40 public class ECPrivateKeySpec implements KeySpec {
  41 
  42     private BigInteger s;
  43     private ECParameterSpec params;
  44 
  45     /**
  46      * Creates a new ECPrivateKeySpec with the specified
  47      * parameter values.
  48      * @param s the private value.
  49      * @param params the associated elliptic curve domain
  50      * parameters.
  51      * @exception NullPointerException if <code>s</code>
  52      * or <code>params</code> is null.
  53      */
  54     public ECPrivateKeySpec(BigInteger s, ECParameterSpec params) {
  55         if (s == null) {
  56             throw new NullPointerException("s is null");
  57         }
  58         if (params == null) {
  59             throw new NullPointerException("params is null");
  60         }
  61         this.s = s;
  62         this.params = params;
  63     }
  64 
  65     /**
  66      * Returns the private value S.
  67      * @return the private value S.
  68      */
  69     public BigInteger getS() {
  70         return s;
  71     }
  72 
  73     /**
  74      * Returns the associated elliptic curve domain
  75      * parameters.
  76      * @return the EC domain parameters.
  77      */
  78     public ECParameterSpec getParams() {
  79         return params;
  80     }
  81 }